Lipid accumulation potential of oleaginous yeasts: A comparative evaluation using food waste leachate as a substrate

Johnravindar Davidraj, Obulisamy Parthiba Karthikeyan, Ammaiyappan Selvam, Kumarasamy Murugesan, Jonathan W C WONG*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)

Abstract

In present study, the efficiency of three oleaginous yeasts i.e., Yarrowia lipolytica, Rhodotorula glutinis and Cryptococcus curvatus were compared for their lipid assimilation capacities using three different FW-leachates as a medium. The FW-leachates were collected from dry anaerobic digesters and diluted to achieve carbohydrate content of 25 g L−1 prior to yeast inoculations. Around 5% of yeast cultures were individually mixed in three different FW-leachate mediums and incubated under 30 °C and 150 rpm agitation for 6 days. The Y. lipolytica produced high biomass with lipid contents of 49.0 ± 2% on dry weight basis. Whereas, the acetic acid concentration of >6 g L−1 inhibited the growth of R. glutinis. The study observed that the selection of appropriate FW-leachate composition is highly important for biolipid accumulation by oleaginous yeasts.

Original languageEnglish
Pages (from-to)221-228
Number of pages8
JournalBioresource Technology
Volume248
DOIs
Publication statusPublished - Jan 2018

Scopus Subject Areas

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

User-Defined Keywords

  • Biolipids
  • Food waste
  • Oleaginous yeast
  • Pre-treatment
  • Volatile fatty acids

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